In terms of the US market, it notes the share of mobile web and application traffic from smartphones, as tracked by the ad request to the AdMob network from over 15,000 mobile web sites and applications, was to 48 percent, compared to 30 percent a year ago.
More requests are also being delivered over wi-fi: 24 percent in November 2009 compared to 8 percent a year prior.
This was particularly the case with iPhone traffic, of which 36 percent came via wi-fi. In comparison, less than 10 percent of traffic from Android devices came over wi-fi.
Of course, the US remains the key market for iPhone and iPod touch; at 50 percent. The UK, France, Canada and Germany are respectively the next biggest markets, but the fastest growing countries are Japan, France, Australia and China.
In total, AdMob reckons there are 23 countries which have more than 100,000 iDevices.
Android is also heavily US-centric.
In November 2009, 88 percent of traffic came from the US (38 percent HTC Dream, 25 percent Droid, 18 percent HTC Magic), while the UK was next with 4 percent of global Android traffic.
And more generally, while the US accounted of 53 percent of total AdMob traffic in November 2009. India was next with 5.1 percent, followed by the UK with 4.3 percent and Indonesia with 4 percent.
The global breakdown of devices during the same month was iPhone 27 percent, iPod touch 11.5 percent and HTC Dream at 2.9 percent.
You can read more details, including country breakdowns of devices, and of device by operators for the US, the UK, India, Indonesia, the Philippines and South Africa in the full AdMob report (PDF, 20 pages).
